Submit

Best Open-Source Mailchimp Alternatives (2026)

4 self-hostable, open-source projects that replace Mailchimp — without list-size pricing that escalates fast. Each is scored for how hard it is to self-host, with one-click deploy options where they exist.

Mailchimp prices by contact-list size, so costs climb steeply as your audience grows even if your sending volume doesn't. Self-hosting decouples cost from list size and keeps subscriber data on infrastructure you own.

Our picks at a glance

Easiest to self-host
Keila

Difficulty 3/5 with a One-Click deploy option, the simplest path to a running newsletter.

Most powerful
Mautic

Full marketing-automation suite, not just newsletters — the most feature-complete here.

Most active
listmonk

At ~16,500 stars it leads this group in momentum.

Best managed option
Keila

Keila offers an official managed option (managed:yes) and is positioned as an easy Mailchimp alternative.

Compare all 4 alternatives

ProjectDeployManagedLicense
listmonk
Go
17k ★
3/5
Moderate
Docker
Docker Compose
+1
AGPL-3.014 days agoRepo
Mautic
PHP
9.8k ★
4/5
Involved
Docker
Docker Compose
+1
GPL-3.010 days agoRepo
Keila
Elixir
2.4k ★
3/5
Moderate
One-Click
Docker
+2
AGPL-3.026 days agoRepo
Forward Email
JavaScript
1.3k ★
5/5
Advanced
Manual
BUSL-1.17 days agoRepo

What to look for: Separate pure newsletter sending from full marketing automation, and remember that self-hosted email needs a deliverability story — you'll still need a reliable SMTP relay and proper SPF/DKIM/DMARC. Performance at large list sizes and an easy import from Mailchimp also matter.

The alternatives, reviewed

  1. #1
    listmonk
    Self-host: Moderate

    High-performance self-hosted newsletter and mailing list manager

    17k Go AGPL-3.0 14 days ago
    How it compares to Mailchimp
    • No built-in marketing automation/journey builder like Mailchimp
    • No bundled deliverability/IP reputation management — you supply your own SMTP/SES
    • No native landing page or e-commerce/CRM integrations
    • Reporting and analytics are basic compared to commercial suites
    RepoDetails & deploy →
  2. #2
    Mautic
    Self-host: Involved

    Open-source marketing automation and email campaigns at scale

    9.8k PHP GPL-3.0 10 days ago
    How it compares to Mailchimp
    • Heavyweight setup with cron jobs and queue workers; not beginner-friendly
    • UI feels dated compared to modern SaaS tools
    • Deliverability depends entirely on your own mail infrastructure
    • Performance tuning required for large lists; upgrades can be fragile
    RepoDetails & deploy →
  3. #3
    Keila
    Self-host: Moderate

    Open-source newsletter tool, an easy Mailchimp alternative in Elixir

    2.4k Elixir AGPL-3.0 26 days ago
    How it compares to Mailchimp
    • Smaller feature set than Mailchimp — limited automation/journeys
    • Fewer template and design tools out of the box
    • Smaller community and ecosystem of integrations
    • No built-in deliverability/IP warmup; relies on external senders
    RepoDetails & deploy →
  4. #4
    Forward Email
    Self-host: Advanced

    Privacy-focused email service, an all-in-one Gmail and SaaS alternative

    1.3k JavaScript BUSL-1.1 7 days ago
    How it compares to Mailchimp
    • Self-hosting is complex and far less documented than the hosted service
    • Newsletter/campaign tooling is thin compared to Mailchimp
    • BUSL-1.1 license is source-available, not fully OSI-open
    • Running production email requires significant infra and DNS expertise
    RepoDetails & deploy →

The verdict

For a straight, high-performance newsletter replacement, listmonk is the standout. If you want true marketing automation, choose Mautic; if you'd rather avoid ops entirely, Keila's One-Click deploy and managed option are the easiest on-ramp.

Still deciding? Compare listmonk vs Mautic side by side →

Mailchimp alternatives — frequently asked questions

What's the best self-hosted Mailchimp alternative?

listmonk is the most popular (~16,500 stars) and is a high-performance Go newsletter manager. Mautic is the pick if you need full marketing automation rather than just sending.

Which Mailchimp alternative is easiest to self-host?

Keila (difficulty 3/5) has a One-Click deploy option and a managed tier, making it the lowest-friction option. listmonk is also approachable at 3/5.

Is there a free open-source Mailchimp alternative?

Yes. listmonk (AGPL-3.0), Mautic (GPL-3.0), and Keila (AGPL-3.0) are all free and open source. Forward Email is BUSL-1.1 licensed.

Do these handle email deliverability for me?

Not entirely. listmonk and Mautic generate and queue campaigns but rely on an external SMTP relay; you still configure SPF/DKIM/DMARC and sending infrastructure to land in inboxes.

Which option has managed hosting if I don't want to run servers?

Keila and Forward Email both offer managed options (managed:yes). listmonk and Mautic are self-host only.

Can I avoid Mailchimp's list-size pricing?

Yes — self-hosting listmonk, Mautic, or Keila decouples cost from contact count, since you pay for your own server rather than per subscriber.

Keep exploring

All Email & Newsletters →Self-hosted directory →Easiest to self-host →
SendGrid alternativesGmail / Google Workspace alternativesConvertKit (Kit) alternatives